yes i have a mn, i've had many, but stupidly sold them long ago before even when they changed to PIVX.
anyways, the hidden costs for a masternode would probably server hosting fee, and your time. the less you know, the more time you need to get it set up right and secure. but it's relatively easy and there's a lot of information on how to set one up now as compared to before.
i say the minimum would be about a $5 server is enough. i use a digital ocean cloud server myself, it's easy to setup. i'd recomment a $20 server, so you may even set up other masternodes on there and play around with it. please use my ref link if you gonna try?
https://m.do.co/c/f5bdb7836584
anyways or you can have someone else host it for you:
for example http://my.mp-hosting.co.uk/index.php
i've heard good things about them. very inexpensive masternode hosting.
that's about it...$20 and some of your time...now go get that mn go get that mn go.
I feel strong manlove rightnow thank you so much ! Can i pm you when i have the 10k pivx ready ?