Living with sycamore......

[paddy555]

If finances are tight, you could pay a tree surgeon to literally fell and block-chop the sections and leave them stacked at the side of the field. My brother’s a tree surgeon and most of their time is taken clearing-up the tree, chipping small branches, blowing the mess and clearing that. It’s relatively fast for them to down a tree of average size, especially if they have a clear-fell region of the space of a field. If you told them your situation and ask for a quote to fell and chop it all into 6-8foot lengths, stack at the side of field, it would be cheaper than a full fell and clear whole tree quote.
Maybe ask if you had burley mates organised to help move the long lengths of logs, if that would be ok and reduce the cost.
You can then work slower in your own time after theyre all felled on logging the lengths, or growing mushrooms…?
A tree surgeon is far faster at felling than a lay-man, and you‘ll be surprised how fast they can down multiple trees.

there is a high demand for wood now as people are installing wood burners. Your local wood supplier may be interested in the trees for free on the basis he fells and removes them. If they are in a 'dangerous" position you could have a tree surgeon with insurance just fell them and then let the wood supplier have them.