We have a side entry vehicle (2004 Chevrolet Express 1500 high top conversion van with Braun Vangater II lift). Before purchasing, we did a tour of places we often go to and concluded that van accessible parking spots that would accommodate side entry are plentiful.
I find the side entry to be easy to load into and unload from. Our van does not accommodate having the wheelchair in the front, but I am still able to transfer to the front seat. When I no longer can, we will get a different, side-loading vehicle.
I would not want to unload out the back of the vehicle into a parking lot with the potential of cars wanting to get by.
We have only had issues unloading from the side on a few occasions. All but one of those was caused by other, inconsiderate, fully-abled drivers occupying the striped area next to the van accessible place we were parked in.
When van accessible spots are in short supply, we park way in the back of the parking lot where there are typically many empty spaces. We just pick a spot with 5 or 6 adjacent spaces and pull into one. Once I am in my wheelchair, distances are not problem at all!
To keep the cost down, I recommend used. In general, I favor buying quality vehicles that are 7 to 10 years old with up to 100,000 miles on them. This has worked out very well for us.
Here is what I would do different:
1. I would get doors that are tall enough so that I don't have to recline the PWC to get into or out of the van
2. I would get a van with automatic doors.
3. I would get a van with a higher payload capacity. Even though ours is a 1/2 ton van, the lift and wheelchair take up a LOT of the usable payload. Together, they weigh over 700 pounds! Our van has a Gross Vehicle Weight Restriction (GVWR) of 7,800 pounds. We weighed it on truck scales and were surprised that with my wife, me, the chair, a full tank of gas, and some luggage it came out at 7,740 pounds. I guess it is a good thing I have lost 70 pounds
Steve