My parents have finished paying off the mortgage on their home and are wondering weather it would be more profitable to sell their home or rent it out. 

Aiming for larger properties on your first deal (100+ units) is definitely very ambitious. 

At times you can profit $40-50K.

Our analysis is ARV - Rehab estimate - Finance Costs - Holding Costs = Profit.  

welcome. it can be profitable but do your due diligence. network with people that are doing it and try to see if can find mentor.

VA loans are the only loans that allow this, and there is no rate penalty for it no longer being your primary home.With that in mind, you could do a cash out refinance today at a higher rate than current market rates which will create profit on the loan, we can take that profit to pay for your closing costs.

The most profitable option is Airbnb, the most passive is long-term room rentals, and a hybrid approach can balance both.

Most of the homes we built on these lots sold at a profit, but a couple did not, again, because of the reasons above. 

Also, how would I analyze the numbers for this deal, because there are various ways it could be used, either separate or possibly all together for a larger group.

But I'm having trouble finding any properties that I could rent, BRRRR, or flip where I would even break even—let alone clear a profit or cash flow.My question is: When you hear that I'm essentially doing 100% financing, does that make it clear to anyone what strategy would be best?