Well, there's always the joy of tinkering and the joy of doing what the wise old heads say can't or shouldn't be done. But the wise old heads may have good reasons for thinking that what you want to do just isn't worth the trouble even if possible. They may even have done what you intend to do.

Decent lenses for LF can be bought, with patience, for surprisingly little money. And not off-brand crap, either. Decent LF cameras can be bought, with patience, for surprisingly little money. Be patient. Watch for opportunities on the various ebay sites and on the various "free ads" sites. Be patient.

Remember that haste makes waste, also that many apparent gifts are in fact poisoned. In particular, very special circumstances excepted, putting a lens in barrel in shutter usually costs more than the equivalent lens in shutter. Been there, done that, recommend it only in special circumstances.