do what I did, instead of going up...go down.
We dug a pit into the garage floor with proper drainage, its about 5 foot deep and about the 3/4 length of an r33 and the width the inside of your tyres on most cars. Was much easier and is very safe given the ammount of concrete used....I dont trust thsoe cheap ones. Has some nice wooden covers and is great for storing drinks if u want them to be cold and the fridge is full!
I makes fluid changes a 1min job, and I have a seat under there to sit down and do any work...makes life pretty easy going
If u havnt got 3 phase, then u will need it and that will cost u enough in itself.