Starters are very very easy to replace yourself, it is honestly a ratchet set and a jack away from being done. Window motors are a bit tougher, but there is a very good online tutorial someplace(Little G used it to replace his).
The best mechanic you can have is yourself. If you know enough to know people are jacking up prices when they see you coming, you are smart enough to handle the issues you mentioned yourself.
-Tim
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