Wow, labor sure is inflated now a days.
Replacing the degas and the thermostat is pretty much a simple job that can be handled by anyone who is able to change disc brake pads.
The problem with the thermostat is that you probably will need to replace the thermost AND the housing. The plastic housing has a couple "ears" inside that the tstat requires to work. They snap off after about 80,000 miles. The two parts cost around $80 each if I recall. What a weird design. On my old chebby and every other car I have owned, you just dropped the tstat in place, the Ford requires you to screw it in place and it will NOT work without the ears.
The degas is pretty easy. Hardest part is getting at the hose fitting for the long piece, which btw, the factory already has attached for good reason. Take a good look and find the opposite end of the long hose and that will be the hardest part to remove. After that every thing just weasles out.
BTW, some guys had recommended one of those cable operated spring clamp tools to remove the hose clamps. I bought one of those from NAPA last year. For me it doesn't make things much easier. Instead I really like the long curved nose needle nose pliers they sell, or a good Channel lock if it will fit.
Good Luck,
Jim Henderson
I used these hose clamp pliers. I couldn't get my monkey hands and any kind of pliers into the tiny little space.