Well also consider the town you are moving intp, sometimes they have gymnast buildings with a profressional tramp to use if you join their club or whatever, just an idea
It depends on how much money you want to spend
for
1000-2000$$ you could get a really nice(professional) tramp i bet if you looked hard enough that would easily support you
For any less you will get a 'family' one probably that will do the job, it might not have as nice as a 'bounce' as the pro ones but they work fine. Personally i would not use skis on a tramp ever, it just sounds bad for your knees and landing backseat would hurt like a bitch. Seriously, you can work on grabs without skis, just imagine the ski is there hahah