not a great idea with angel fish because hillstreams like pretty cold water and verry high flow
you can get ones that like higher temps but i doubt the angel fishes long fins wuld be verry usefull in a high flow tank
but if you like them all you need is a 20 or 30 gallon long with a 50 or 60 gallon powerhead or two, pleanty of smooth rocks and a mix of sand and heavy smooth gravel.