Home Improvement

That's what I assumed was going to happen and is probably what I'd try to do on my own. Caulk and paint is easily done. PVC will last forever

$675 seems steep for that, but for them there's also some opportunity cost -- if they weren't doing your job, they could be doing a different job for more money. So instead of saying no outright, they price it up to make it more worth their time.