When production time is not and issue but i want as accurate as possible sharp round surfaces and without using support-material, the only thing that comes to mind is SLS. Are there other types that use the powder as it works as a support on itself? Apologies for my lack of knowledge and poor english.

Are there any home-usable / affordable ones in the market? What is the starting-prices ?

My skills as a modeller are somewhat lacking and my models would need lots of supports, also speed is no issue but the price of the machine is.