*Update: Good grief, the pics didn't resize like my original ones. Apologise in advance for the huge pictures*
Hey ChristopherLutz and others, thanks for input. The issue for me isn't so much money as it is engineering. Money is a secondary factory. I've always been interested in building stuff and the engineering/mechanics behind it. For example, take a look at my home built workbench/tool storage area. If anyone is interested, I can post more pics but this is an example where I made my own workbench rather than buying a pre-built one. Mine cost me around $400 in materials and is so solid I can easily walk / jump on it without any movement/flexing .. and I'm around 215lbs
The racer ramps are a great example .. they cost $2800 but in reality, they're not so dissimilar to my idea. I could spend $3000 on a two post car lift but in the end, what it means is:
1. I'd have to cut out and pour new concrete where the posts will be placed. My new garage floor was poured using 4500psi 4" concrete but I would be much happier knowing that I had a 6" pad made of 7000psi+ concrete. I wouldn't have the entire pad poured, but I would cut out a 3'x3' section for each post. Probably cost $1,000.
2. I'd have to get rid of my brand new $500 belt drive garage door opener and replace it with a LiftMaster 3800 (another $600 inclusive of installation) so that I can raise my car without it hitting the existing garage door opener.
Now, if I worked on my car reguarly this could be a sound investment, but I don't need to fix stuff on it frequently. A car lift would definetely be cool, but would also be overkill for me.
I guess the question from an engineering perspective is:
1. Are 3 vertical 2x12's strong enough to hold around 2,300 lbs?
2. Is the blocking I'm using strong enough to prevent side to side motion?
3. Is additional bracing required to prevent it from tipping from side to side if the load isn't evenly balanced? (The answer is yes)
4. What else can I do to make it better?