Painting dilemma (long). What would you do?

Also I need advice on constructing a temporary paint booth which I only plan to use for this project. Since the car is not driveable without glass or lights, even if I could borrow/rent a booth it's not practical way out here in the country.

One problem is that my workshop (inside a 40x30 steel building) has a dirt floor which isn't perfectly level, and the 4x4's of the sill leave a gap of up to 8-10" to the ground. I'm thinking of putting a tarp over the dirt and driving the car onto it, then building the booth around it. I will be removing the hood, trunk lid and both doors to paint them separately - not sure if before or after the shell.

The rafters are about 10' high, so I can staple plastic sheeting directly to them and not have to build a framework. Sides can reach to the ground the same way. For ventilation I've seen articles showing two cheap box fans with furnace filters duct-taped for intake and exhaust. Fluorescent lights are already strung from the rafters and I'll add at least one more two-tube eight foot fixture.

Any ideas? thanks.
I wouldn't filter the exhaust. Lights on the walls too. Get everything ready including your paint mixing station at least a day before spraying, let things settle down dust wise. Next day, let your fans run for a while. Tip toe into your booth and tack everything. Tack yourself, gun, hose, etc. between coats. Uses old tack rags for hoses and what not. Let your sealer dry good and de-nib before applying color, using a tack rag to gather the sanding dust. #600 grit. You can tack between coats of color if using bc/cc. You can even sand the basecoat between coats but not the last coat before the clearcoat.

Maybe park the tires on a couple twelve foot 2x? lumber to hold the tarp down a little better.