If you go to sell the business, but want to keep the land and lease it to the business, I would then separate them at that time. 

I would think selling would be the best option so you can move on from the property and then invest elsewhere (not in an IRA thereafter). 

The thing that the gurus never tell anyone is that the majority of creative finance deals are done by investors who don't need creative financing, that is their leverage and why they can walk away, thereby making them more attractive then the one person who can only do the deal one way because they have no money of their own.

I already pay a management fee, then they mark up work?

IF the deal is good, then they will tell them. 

So for example, if I can buy a new construction home for $400,000 (which was negotiated down from $435,000) then hopefully my $80,000 (down payment) was used to buy an asset which will be closer to $500,000 in a few years. 

If rates and prices go up, then there will be a ton of renter demand that could fast forward rental the market. 3.

If that is the case then their loan would not go against the property and you keep the land loan. of course then you need to come out of pocket for site prep.

As far as being expensive; if the tax liability is not large enough then yes I agree, however, it depends on what is being sold too.

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!