There are few altcoins with a good masternode reward, such as Tokugawa (TOK), Solaris (XLR), LindaCoin (LINDA), etc.
But these coins are kinda expensive now, so I think you should try to find an ICO which offer a masternodes feature, while at the ICO, I believe the price shouldn't be that expensive. Try to do your own research!!
I hope you find a good one