I can think of lots of reasons. 1. it would probably be the only way you could do it period. do the best you can with what you have. 2. your goal is to put out the best possible songs, with the best quality you can produce, but it might not be technically perfect. 3 it might be your last chance to capture certain singers before they die or become incapacitated. I can think of our friend who had a stroke years ago. I would rather listen to her on a less than perfect recording than not at all...her voice was magnificent and is thankfully coming back to a certain extent. 4. your sales can not justify the additional expense. Your audience/fan club might be made up of people who just can not afford what it would take to produce the highest quality perfection. 5. besides money issues, you might have issues of plain old energy. 6. you might not have geographic access to those who can do a perfect job and have to settle for less than you would prefer.

The question would be should I then drop the project entirely, or do what I can do and have truth in advertising so that I don't advertise it as perfect perfection. I say go for it and price it accordingly and don't eat yourself up over imperfections.