Pros here are unlikely to be able to help since we typically employ standard methods that lead to predictably acceptable outcomes and are labor efficient. Perhaps some DIYers will chime in.
As a DIYer I'd hesitate to pay that much for a tool unless I was going to get my money's worth out of it. Before paying big bucks for the Festool I'd buy a $50 orbital and modify it to work with a Shop Vac, probably the smaller one that has a filter and bags. Then I'd sand one bad area starting with the coarsest grit and gauge the effectiveness. For areas with paint or thick finish, you might consider using stripper first and scraping off as much finish as possible.

I had one of those Orecks. It was reasonably priced and did a decent job of buffing up wax if you added a little elbow grease. For sanding? Forget about it.

Thanks so much for the advise! That's good to know about the Oreck.

Go rent a Super Bee orbital sander. The rotex will not do the job like you think it will.

That Oreck machine has a huge learning/control curve. If you have never used a buffer, learning with that machine will be dangerous. Buying that or the Festool sander will cost north of $450. and a hand Festool sander will take days to do an average size room floor---keeping in mind the process starts with 40 or 50 grit sandpaper, then 80, then 100, then 120, and maybe 150.

USand (at rental stores and some Home Depot Tool Rentals)makes a sander that is so easy to learn, it only takes about 10 minutes,and is literally almost impossible to make a mistake using. Drum sanders(what many pro's use) take months of learning and can destroy a floor in a very short time is misused.

The major drawback of the USand machine is it is heavy. A minor point is it takes longer than the drum type(which means less profit or higher labor prices for pro's. For DIYers, it is GREAT. It has really good dust collection as it only leaves granules instead of dust on the floor while the dust is collected in the bag. The granules are easily swept or vacuumed up. Has varying grits from 40 to 150.

Thank you G & S Floor Service and HandyMac! All of this information has been very helpful. I did some checking and found the hardware store in town here has a USand machine. I will have to check it out to see if I can some how handle the weight of it. Thank you again!