A little bit about my experience in Real Estate… I started a couple years ago doing some house flips in Detroit ( It was a 2 year plan) then decided to sell everything, moved to Washington DC which can’t afford anything in the DMV area but last year I purchased a very nice 3500 SQFT Duplex in Shaker Heights, suburb of Cleveland. 

It was built in 1973, is in fantastic shape but dated, has a 4 year old roof, is in a good part of town, 1,100 square feet upstairs as well as down and both apartments are 2 bed 1 bath.  

What matters is that it's fair and square deal.#5.

4- Finally what price range / square meter / type of property (house VS Apartment) would you look for. you as an investor that will appeal to the Market. 

I take the average price per square foot for those best comps and apply it to the subject property.

As a side note, I canceled my paid subscription with Rentometer recently when I was researching this property:   421 N Washington Street, Jacksonville, FL 32202 Rentometer (Paid) showed 1BR at $1,026 and 2BR $1,318. 

If you're buying right then getting the loan refinanced shouldn't be an issue. my dad was doing sub to wraps in the 70s when I got into RE and I have done well over 200 of them personally.. until OR WA changed the laws dealing with pre foreclosures.

Currently, I reside in Washington State, but I am keen on investing in the Houston area.I have noticed that many properties have become quite expensive.

Step off the edges of it as a square see how big it is.

Bedrooms definitely help on a BRRRR for appraisal, but the square footage is still the same.