DIY Building a Master Bath
I think you've come to a great place for advice, some here are well versed in code requirements, but maybe not for your area. Many members give awesome advice freely...all you have to do is post the questions, and if you don't have one get a digital camera...for I can assure you someone will ask for pictures of a troublesome issue.
Getting a pro to advise you would be hit and miss. If I were in his shoes, I'm not sure I'd commit myself at the level you suggest...and IF I did it would COST. That said...in this economy there may be some looking for anything to keep some cash flowing.
I would come at this with a whole different approach, generate your plans, before and after, outlining everything that needs to be altered along the way. The kicker will be the things you can't see; drain piping and venting for the plumbing system, electrical re-do, etc. Include as much detail in your planning process as you can. Go to your local code official office assuming you have to get permits, and start asking them if they see any issues, and if there are red flags at this stage, you'll have a great idea of were you need to get additional information. The inspectors will tell you when the inspections need to be performed and the permits you'll have to have. Start with your eyes wide open...and if you don't know something...find out before moving ahead. I've said all along it's more important to figure out what you DON'T know than what you do.
If you have the skills you think you do...your project should be doable.
Good luck...start a new post with your progress from start to finish...it would be fun to follow along....
when it comes to breakfast, the chicken is dedicated, the pig is committed.