When I am deciding whether to work with a potential new client one of the most important aspects is to make sure he has access to the funds that will be necessary to be successful.  

Immediately after buying Prop B you do a refi or 2nd mortgage on it and take the cash out to pay yourself back for the expenses incurred in improving prop A.The second way would be to tap equity on Prop A to improve it and then sell it have the new debt paid off as a mortgage lien upon sale and then complete the purchase of prop B in the 1031.Industry preference is that new debt is taken after the completion of the 1031 so there is no way the service could construe that you took out the debt as a way to access profit outside the exchange.  

IMHO you won't find the really good deals on the MLS, most Investors, (Like myself) already has access to it and will pick over what is on there.

His mother will have access to his accounts and will send me my rent check each month.I may take the opportunity to make some minor repairs in the apartment during the time.Thanks for all the advice.Phil

I wouldn't list high and then constantly drop price, or at least don't drop the rent in fast increments.

Even if the use is authorized, what do codes say about utilities, entrance and access?

However, I have a bunch of buyers interested in it, and they have not been granting me access.

Does that include MLS access cost?

Since there is no basement, I imagine the repair involves cutting through and replacing parts of the floor to be able to access the cracked part, but I don't have any experience with this type of foundation work.  

You can also use my website which has MLS access.