Lift: 2 Post or 4 Post??

I have 2 Sprinters; a 2005 Dodge 3500, and a 2003 Frieghtliner 3500, both high roof extended models

I drive them daily and for work, I own a small plumbing business and I do my own vehicle repairs, even on personal.

I am getting tired of rolling around on the grass and I'm going to be building a structure to house the lift if necessary... (I've seen some lifts installed outside?)

I dont know which style would be best?

A 2 post like this:

http://www.gregsmithequipment.com/Atlas-PV-15P

Or a four post lift like this:

BendPak 4-Post Truck and Car Lift — 14,000-Lb. Capacity

I would love your suggestions and input. Thanks Guys!

Garages around here all have 2 posts. Looks like better access and the wheels are free to be worked on. The 4 post looks a bit awkward but then you could buy this as well https://www.northerntool.com/shop/tools/product_200687183_200687183 but it all adds up pretty fast. I get that the sprinters are unibody, but if a jack has the reach to lift at all the correct lift points, what more exactly does a sprinters require? Or is it the case that you are not supposed to lift the vehicle in its entirety with the jack points? If I ever get a house with a big enough lot/garage I’m with ya, rolling under rigs is getting old.

When I had an oil change by the local Dodge dealer (they were supposed to still have a Mercedes certified mechanic on staff) they had to put it on a 4 post lift since they couldn't find any satisfactory lift points for a 2 post. Are we confident a 2 post lift can do the job?

I use a 4 post Bendpack, although I do have a new Challenger 2 post (installed recently) for "other" vehicles the 4 poster is the best for the van.
Dennis