Next would be online crowd source, then HMLsNo need for LLCSame. 

This is one of those time you might wanna find an attorney to get legal advice.But the simple answer is, you need to pay your tax bill.

Legally, a townhouse is not a form of ownership.

He is not permitted to charge for his time.Once you see the contractors fees you know what your landlord can legally deduct from your deposit.

Additionally they can legally demand all their remaining advance payment back at any time since it remains their money until used up.

These national online portals work good on properties that attract the Good crowd. 

Give notice to the tenants that rent will be increased to full market, with proper legal notice, and let them decide if they are staying or going.

For Sale by owner, Sales Agreements.I’m curious to learn what clauses or protections others builds into their sales agreements to ensure (or allow for legal action) if a private seller sells their property to someone else / backs out of your deal once already under contract.Fortunately this has never happened to me and the last 6 properties I bought were from private sellers without a real estate agent or attorney, however It could and likely will happen at some point...

I've only seen the KREIA ones online. 

You can deduct legal fees and repairs, but not lost rent.