Appreciate it brother. I do alot of black and grey but I do walk in so I have to also be ready and equipped to deal with anything thrown my wayone of the best artists i've ever met/worked with learned in prison. he has a chair at a famous shop in vegas.
naturally he is a rotary guy. he would buy a machine... do a few pieces with it & then sell or trade it for another until he found what he loved.
you can go that route. i would suggest getting some of the artists in your shop to let you use theirs or maybe doing a pool where you guys buy a couple machines & pass them around.
personally i use a centri evader 2 & love it. i'm looking at a Valhalla & have always been interested by a swash drive. coming from & loving coils, adjustable "hit" & a spring like "give" is familiar to me.