They GAME the system.They buy the buildings CHEAP because they are rent controlled.. harass the current tenants, get them out, and then make MILLIONS by converting to condos and selling them at market.It's not fair to guys like me who don't have the means to do it and even if I did, I would not cause the suffering of so many people in order to enrich myself.Guys like me suffer because I am unwilling to play their illegal games.

It's always a good idea to have a few different lenders at your disposal in the off chance that your primary lender is too slow or is unwilling to fund a deal.

I agree with @Brian Pulaski have a 3rd party verify that what they are proposing is a long term fix, if they are unwilling to go through with this extra step, your best bet may be to walk away. 

I would bolt...even one unpaid parking ticket demonstrates that the tenant was unwilling/unable to meet that financial obligation - even at the risk of greater expense and possibly arrest. 

Those homes are typically “as is” properties and if there are not certain things (running ac/heat, flooring, or a solid roof), you may find the lender unwilling to lend.If this is the case you can always go to a hard money loan and not worry about the condition since that type of lender will be looking at the investment, and they’ll calculate the return on the product.

Purchase and Sale Agreement, Sales Contract.Lender has no knowledge of and is unwilling to investigate into latent defects, is selling as-is with some systems not working?

Are they refusing to share any income/expense data or are they simply unwilling to provide a formal P&L?

If you're unwilling to drop $300 on plane ticket to go see your property, you shouldn't buy it.Let your amazing property manager dictate where you invest.

Since you haven't even been in contact with a principal (executor or administrator) you don't even have a prospect.What you have is an opportunity that you have identified that (may) fit somebody's investment criteria.Now, if you are not a principal (unable or unwilling to close using your own resources) you'd better figure out how you add value to this estate seller and justify carving out a chunk of the equity.

Lastly, sometimes seller's are unwilling to provide documents and answer a lot of questions until they are officially under contract with a serious buyer.My office is in Los Angeles and my answers are based on my experience here.