I can't say from here. There are too many unknown variables which you left out. And the more info you provide, the most likely, the more questions I/we'll have.
There are times where hiring a pro is the way to go. Have 3 pros bid the job and ask each of them what they're going to do to 'fix' your problem(s). From there, you can decide if you can do it all or part of it. Talk w/them about doing your own work AFTER you get your estimates. That way, if you're doing some of the work, they can tell you how much to deduct from the ORIGINAL bill.