I don't know.........I mean, if you can afford the amp you really want, be it a
tube head.....it will still sound pretty decent at low volume....you will get to stare at it, spend time with it, get excited to play it at gig volume,,,,,maybe be inspired to form a band, etc. As for me, I wasn't able to afford my Soldano SLO100 until I hit my 30's, had a wife and kids, and had just got out of the "gigging every weekend" life a few years earlier. But I can honestly say that I will never regret buying my dream amp,,,although I do get to crank it in my basement. And I do intend on reforming an "originals" band soon. But I say go for the Mesa now, if that's what you want. Get the amp of your dreams,,,it will only inspire you,,,,and it will still sound good enough at low volume. Anyway, just my thoughts from my experience. And you can always make use of a small transistor amp for very quiet playing, too.....I still have my Crate G60 from the late 80's that I use a lot yet for the living room, etc.. What I'm saying is, it is never to early to get "the amp" you long for. You just won't regret it.