Alison .. Im sorry you will get the brunt of this, but here goes ....
If you are going to get out of house appraisal get all the way out. Dont take work from appraisers who stick this out, try to get clients, remain loyal to their beliefs in ethics and honesty, only to have a part timer get business and essentially take money from their families. I believe if you are an appraiser you are full time and that is the only way to keep yourself abreast of issues, happenings in the market, trends, etc.. Getting out .. get out. Staying in .. Stay in. Doing things half time is the same as doing them often half way ... it simply shouldnt be acceptable. Trust me your clients wont care if you can only work on Saturdays and nor will the homeowners.
Like your momma told you about the front door ... stay it or stay out ... you cant come back and forth.