Just curious, the seller was completely unwilling to negotiate on the inspection timeframe?

This home had already gone under contract twice in the previous year and both deals fell through during due diligence because the sellers were either unwilling to make or unable to afford any repairs.

because we put the work in that others are unwilling to :) 

I can honestly say I would have terminated the transaction if the seller had been unwilling to remediate this.

If they are unwilling to provide proof, then ask for a reduction in price or a seller concession/repair allowance at closing to cover the risk you're taking.

My father would like to use the equity in their primary residence to invest in some other properties but when he has talked to several lending institutions they are unwilling to work with him when they hear that he has almost no W2 income (he does get social security).

What if the other occupants are unwilling to contribute to the HOA?

If they are unwilling, ask your GAP funder.

If the CPA cannot or is unwilling to provide at least approximate numbers, it's either they are new to the business and do not have an idea of what to charge or they do not want to scare you away with their high prices.

Those are the reasons we oftentimes hear, and hear frequently from folks unwilling to look in the mirror and set expectations for their real estate investments that are closer to market.