Hi Cheryl,
See if there is any possibility of your sister getting a credit card that would allow her to transfer her $5,000 current credit bill to a no interest for one year credit card. If that is possible, depending on your sisters credit history that would be very good.
Ask the dentist if he will accept a lower figure for Pay back. If she is to pay $50.00 a month ask him to please accept $25.00 a month etc.
See if your sister can get a Medicare plan that includes dental and co payments at no additional charge to her (call Medicare and speak to some advocate and speak to your Library?) Look at your current Medicare information book.
How much would section 8 allow for the rental of your house?
Is their a Heat subsidy available in your town/state??
How does section 8 figure the charge for Heat and hot water?
Section 8 has to approve your house. Will it meet their standards and if not can you bring it up to their standards?