And if I go on with the purchase, how hard will it be to evict them? 

But for assignment of contracts and other investors purchasing property you bring to them; Pace Morby or Jamil Damji would be two great guys to check out their online content!

Should I have this established before purchasing a property, or accumulate it over time after making a purchase?

I have cleaned up a number of these deals over the years.. they are all great when they are working and everyone is on the same page but when they are not.. there is extreme risk to the original seller especially in Texas were a bank or lender can get a money judgement on purchase money loan.. out west not so critical original seller just gets their credit trashed if it was not already.. but there is no money judgement available to the lender for a purchase money owner occ loan in first position.

Considering the new construction (2023) and current occupancy, is the purchase price reasonable?

Is anyone using Purchase Money Mortgage ILO Contract For Deed?

Purchase price: $500,000 Cash invested: $125,000 Bought a 3 unit property 10 mins away from me!

I tried to use nerd wallet but their estimate is vague and you cannot put in purchase price/bed/bath information.

Adjusted basis is purchase price plus improvements less depreciation.

Account Closed if you want to ignore all of the strategies that get around your downpayment and just want to purchase another property outright then you would have to leverage something.