It can be done successfully but you need to understand all the risks before doing so.

Have one rental that has been successful in the DMV area.  

My impression is that the most "typical" range is from 40/60 to 60/40 and this would fall towards the higher end (and may well be justified as the sponsor has a solid history of successful projects).

And don't forget that the most important element for the long term success of your out of state rentals is going to be the property management. 

I discovered BP 3-4 years ago when I was first introduced to REI by successful friends in a Multi Level Marketing company I was apart of.

I was curious if there were any others who started wholesaling part time outside of their 9-5 jobs and found success, or even failure.

Still, while letters do a lot of the heavy lifting so to speak, the mailing list is equally crucial to a successful campaign.

We're in the early part of my career, but have already had successes with real estate. 

Which is why wholesaling is much more attractive because it requires no start up money. you cannot successfully wholesale as its taught by on line courses or gurus if you have no money.. the successful wholesalers be them licensed or not spend THOUSANDS upon THOUSANDS a month on lead generation.you could bird dog.. maybe with limited captial just gas and a phone and hope that you get paid. 

And since we are learning about construction, being able to go after work and measure cabinets for the 4th time, or compare the tile to the grout, or pick up supplies so your expensive contractor doesn't have to waste his time picking out paint colors, flooring, appliance etc... are all things that are easier to do in person.If you have a lot of experience flipping houses, or working construction,  then yes go for it, you can be successful as a long distance landlord.