I woulod check into this "medicaid" claim a bit
Normally, people are allowed to have a certain amount of income and still retain medicaid. it depends some on the particular circumstances. What I would do is try to get specific details of the medicaid situation.
If she cannot have any income, you are stymied and have to go elsewhere. however, if she is allowed some income, I would see if I could craft one of three scenarios for a deal:
1) Do an owner carryback - with monthly payments to mom $50-$100 under the maximum allowed. Plan on renovating and keeping the property for an extended time. There are ways you can set up the mortgage so it will not be moved for further sales - for instance it has a massive pre-payment penalyt (again, so mom doesn't get kicked off medicaid) with an automatice subordination clause (so it always stays in a second position and can be refinanced under.
2) If the property needs little work, see about a long-term lease. Again, make the payments for just under the maximum mom can have. Then you do the clean up, lease it out and pocket the difference for the next 10 years.
3) Look into the possibilities of doing the property under a land trust.
Good luck