It is a negative in a blanket effect first of all. Artificially raising wage for 'everyone' means that has to be paid by the businesses employing 'everyone'. That means higher prices on goods and services for everyone, including appraisers in those states. Perhaps a poor example, but you think fast food prices are going to remain the same, or quality, or serving sizes? Any redistribution of wealth will always hurt those who are the ones being redistributed FROM. It will also hurt any appraiser who has employees working for them, for obvious reasons.
In a sense, it may help appraisers, because if someone is comparing $8/hr to becoming an appraiser making $20-25/hr, that looks a lot better than falling out of bed with no HS diploma and making $15/hr, vs spending years of their life to take on a big financial risk to maybe make $20-25/hr, with poor job security for the future.
The more folks get rewarded for having little education, work-ethic, or drive, the fewer will see any benefit whatsoever in jumping through the myriad hoops required to become an appraiser, to make marginally more in a good year, with prospects looking increasingly more bleak in the future.
The other high level reason it is bad--there is only so much money to go around. In the end, appraisers get paid by lender/clients. Through AMCs many times. In both cases, if every AMC and every lender now has to pay $15/hr to every employee, even the first day teller or first day order assigner, there is even less cash available to pay the appraiser. Some businesses, especially labor heavy ones, will invariably go out of business. People will invariably have their hours cut or flat out laid off. Neither of these can be construed as good in any way for anyone. Fewer clients means a greater consolidation of appraisers working for each one, meaning some of those special lender relationships some of us now enjoy will go away. The local lender will be especially vulnerable, as they tend to have more, lower-paid employees.
Raising the minimum wage does NOT increase the total money supply available to pay laborers. Businesses will not be given fresh rolls of $100 bills from the treasury. Folks, it has to come from somewhere. Where do you think that will be?
Rant over. I tried to stay on topic anyway.