SorryCheck like a 203B loan

Not really necessary.You will need a commercial loan refi with higher interest and maybe more down to cover it.

Also wondering if I can get a second loan (Commerical) looking to go bigger with a 5+ unit building using the 75% of profit from first one. 

Here are some reasons not to sell:- 2.7% loan is very low by today’s rate.  

Get the cost analysis and blue prints done and work it out with the construction loan committee and start the work draw phase.The other options which can be a little easier is buy a home that will pass an Inspection/appraisal and not be "Subject to" but does need a lot of TLC/renovations and do it yourself.

If the buyer got a loan from a traditional lender to get to the 75k number, would that automatically put me in a second position on my seller financed note?

We plan to install a couple systems for ourselves and clients this week.

Refi to get a better rate is good but have to weigh the cost of money and the time you have the loan to see if it is worth the costs to get a new loan.

We will finance the 25% down with a loan at 3% from a life insurance policy loan and hope for the best on the conventional investor loan we will have for the purchase money.

Is there a way to get a construction loan with the original property still on the land so I can do a new build on part of the property and then slowly rehab the historic property?