You can follow the link in my signature to the disABILITIES Board for more information, but to answer your questions quickly.
1. how hard is it to get one of these at any of the parks? we will be there thanksgiving wed-sun.
They are called
ECVs or
scooter and are limited quantity, first come, first serve at the parks. The time you are going is a busy time, so unless you get to the park early, they may be all gone. A lot of people chose to rent from one of the off-site medical rental companies. Here's a list of the ones DIS posters report renting from:
Care Medical:
http://www.caremedicalequipment.com/
Phone (407) 856-2273 Toll Free U.S and Canada (800) 741-2282
Walker Mobility:
1-888-726-6837
www.walkermobility.com
RANDY'S Mobility is in Kissimmee 407-892-4777
http://randysmobility.com/
Colonial Medical
http://www.colonialmed.com/about_cms.html
(800)747-0246
2. is there some kind of handicap entrance to rides? she cannot wait on lines....
If her only problem is that she can't stand in line, having an
ecv will take care of that for her. In most of the lines, she will be able to bring the ECV right into the line with her. For the few where ECVs can't go, you can trade it at the line entrance for a manual wheelchair.
Most of the lines and all the fastpass lines at WDW are what is called "Mainstream Access", which means the lines have been made wide enough so that wheelchair and ECV users wait in line with everyone else. There are a few rides/attractions with wheelchair entrances, but in most of those cases, you wait in the regular line until just before the main line goes to the regular boarding area. At that point, there is a wheelchair access that takes you to the wheelchair boarding area. Here's a
link to a post about boarding that explains a little more about how the process works.
Here is a
link to the DIS page about touring with mobility disabilities. If she has other conditions besides mobility that will make waiting in line difficult, please come to the disABILITIES Board for more advice.