Another vote for a four post drive-on lift. You need a sliding (hydraulic) frame jack to do wheel work, but they aren't expensive.

In the shop I always found side-post lifts to be a pain, as vehicle doors opened into the posts. There are offset post models available. If it is just for service work as compared to storage as well, and you want to do it up right, get an in-ground hydraulic model.

__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue