Your debt to income will be calculated per conventional guidelines and if you qualify with both your current mortgage and the new mortgage plus all the rest of your debt you are good.

For calculating ARV, platforms like Zestimate, PropStream, and Reonomy use machine learning to analyze market data and comparables.

The big question is whether you calculated cashflow properly.

.- Dividing by 4 units leads to $1400/unit/monthly rent.What are you factoring in your ROI & cashflow calculations for maintenance?

If this is your first deal, I would recommend  understanding the math and start using the deal calculators on every one.

BiggerPockets has some great calculators that can help you determine if a deal actually makes sense financially.

houston is probably similar pricing to Columbus Ohio but way worse zoning laws. we take 20% on top as a GC and a guaranteed fee agreement. our contracted new construction projects recently:Single family new build spec home: 1513 square feet with 3 beds 2.5 baths 1 car attached $275000 approx $182 a square foot if calculated using heated square feet which means our cost is $145 a square foot. 3 unit / triplex new construction: 2008 square feet 2 bedrooms 1 bath per unit or total 6 bedrooms 3 bathrooms with 3 off street parking spaces. contracted build cost $395,000. no garage on this and better economies of scale with shared roof, slab, etc. $192 a square foot hard cost with our cost running approximately $157 a square foot. 

•Always calculate future taxes when analyzing rental profitability.8.

If that is the case then that is considered cost of doing business and I would advise that should be calculated in your costs/returns you provide to the investor.IF you are referring to the investor who is the borrower - then I would have included that cost in the loan agreement.

For running numbers have your realtor if he invests run through it with you or use one of the free investor calculators on BP.