VA loan- down or no down payment?

Hi. Super lost as a first time homeowner.

Is it better to do zero down so I have less lost when selling the house (closing cost + agent fees) and just try to get a house that’s literally within BAH so BAH pays for it?

Or do a down like $10-20k plus our possible closing cost so that’s an Initial investment of at least 30k already, I’m worried the housing market by then the house won’t go up much in value or even lower then I gotta pay closing costs , and fees for the realtors or if I rent it I don’t have a renter right away and I have to pay for those months.

Can you guys please help out, very bad at math lol.

Tsgt -BAH is only $1800 where we’re going and the houses are $250-400$ if you want decent ones. There’s a few under $200k but needs tons of improvements.

Rent in the area is also high and offbase not inside base housing so we decided to finally own a house.

Do we do 15-30yrs? That’s another thing I’m confused about.

Thanks