I know that the expenses out weighs the return which is why they are free. I just hate to see them trash but if that's the way it goes I tried.
You're going to pay anyways to have them removed, it is just a matter of to what degree, and to what degree is it important to you how the trees are utilized.
You are going to pay, probably quite a bit, to have them removed professionally, chipped, and scrapped out for firewood.
You are going to pay, (maybe less if you find someone willing to do it) to have them pieced out and hauled away to be turned into usable lumber. Not milled by a professional mill, but rather by a milling hobbiest, as the big guys don't generally touch the small stuff. And most little guys don't either.
And generally speaking, the less you pay for removal, the more risk you assume and more damage you incur from the removal process....whatever method you choose. There are exceptions, but unless you are willing to have someone set up a portable mill in your yard and mill the stuff on site, or you're willing to incur some damage to your yard and lawn to get the equipment in to properly drop them and remove them in sizable enough sections for milling, then the only other option is to cut them down and chop them into small pieces for easy removal, i.e. 'firewood'.
It always cracks me up when people talk about 'free' wood for milling, not realizing the economics of what they are asking, nor willing to endure the trouble and effort necessary to see that the trees are turned into something besides firewood and mulch.