1 Ac lot- How many homes on average- Home Development

[Mak K.]

I am doing my homework and research. I have a opportunity to have a 1 AC lot ( Current price, $190K) in Houston area. I was wondering how should I do high level estimate on cost of construction for homes. Plan is to develop and sell the homes. Usually how many average starter homes 1800 SF - 2000 SF homes can you develop after driveways etc. Also would love to know from other members how much they spent on the last project and what is a good contigency to put on the final cost for a first timer.