Yea man, no problem.
I’m happy I reread this post; Tom said “The difference would be probably a few months rent since it will take a months to rent it.”
What I got from that is if;
The future projected rent is $7,500 per month for 4,500 sf @ $20/sf
& the purchase price is $510,000
I’d subtract 3 months of rent to make it a safer purchase e.g.:
$510,000 – (3 x $7,500) = $487,500
New PP = $487,500