It is very big,we are renting a bucket truck to trim it,I don't want to harm it. yes I would hire someone, but due to lack of funds, from living in Florida I am unable to hire someone.

Unfortunately you really do need to hire someone or get someone knowledgeable to do the job. If you are renting a bucket, then you could more than likely afford to have it trimmed.

Always be safe. That's the main thing in trimming trees. As far as limbing goes, it's pretty easy. Especially, if you have a lift bucket where you can position it where ever you need it. It's a two person job. Leave the chainsaw off until you get situated. Always be aware. Think ahead and judge where the limb will go so that your not in it's path. If it's a huge limb, really thick, you should do it in managable sections. If there is a chance it will damage your house there is an easy solution. If your cutting it into managable sections the throw a long rope over a limb as far away from the house as you can. One that is parallel with the house or the rope will slide down it to where the limb meets the tree and defeat the purpose. If there are only perpendicular limbs the a branch coming off a branch will stop the sliding. Tie the end where it wont come off of the branch your cutting and the proceed to cut on the tree side of the rope. Again being carfull to stay out of the swing path and not to cut the rope. Have another person or two holding the rope. Especially, if they are lightweights. The point isn't to hold the limb, but to guide it. So if the limb swings swiftly away from the house and there is nothing it can hurt then let the rope go before it starts to swing back and make sure it doesn't hit the person who was holding the rope. Never tie the rope to a person and don't tie it to and object that can't hold the weight or something will tear up or someone will get hurt. Keep in mind that the limb weighs more when falling because of gravity. The other way that is less acurate and won't work as well as the first way, but only takes one person holding the rope and they can be a light weight. Just tie something heavy to the end of the rope throw it over the limb to be cut near the tip away from the tree. Let the rope come back to you. If it get's stuck then whip it. Tie a slip knot in the end, slide the rope through and pull it tight. Get the cutter in position, keeping in mind to stay out of the fall path. Have some one put as much tention on the rope as they can as the limb is cut through and it will guide the limb away from the house.
I have limbed several both ways and either is good though I would recommend the first. When cutting a limb, the best way is to cut a 1/4 of the way through the bottom of the limb and then cut down to that cut from the top. I'm assuming you have a chainsaw. If you don't I would highly recommend getting one or borrowing one. I don't know what I would do with out mine. You can use a hand saw, but it's going to be murder on your arms and back. Good luck.

You may want to save up and hire an arborist, or at least see if there is anyone in your area botanical gardens, local university if they offer agriculture/landscape design, or a garden expert in the newspaper, anyone who would be willing to give you free advice. You can seriously damage the tree by improper pruning and make it a worse hazard to your home. At least do a little research about their growing habits and, if you can find it, anything about pruning them properly. Good luck!

Hey...most people can't afford to get a lift bucket. Just start on the end and trim a little at a time so as not to damage anything when the limb falls. Once you get to the main limb...heavy part...trim only what you can handle. It may have to be 2 foot pieces...if that long. You can trim all the way back to main trunk without doing any damage to the tree. You might want to trim back the limbs on far side of tree so as to balance it.

burn the house down leave the tree along