Get a gander at your competition and see what they are offering and take it up a notch.You might check Fiverr or TaskRabbit (not sure for interior designer) and see who is out there.They should be able to help you out remotely and without spending a ton of dough.

Especially #4 about durability.Do you charge your clients a flat fee based on size/price per sqft for your services, or % of spend?  

Stop hanging out with your deadbeat buddies who spend all day drinking, talking sports, and otherwise wasting away.

I spend money on postcards, distressed lists and a website.

Like @Chris Seveney said, private lending is a great way to go as well.  

Stop hanging out with your deadbeat buddies who spend all day drinking, talking sports, and otherwise wasting away.

And they'll want you to pay off the loan pretty soon (and usually will you as the rate will probably be higher than banks) so there's that too.For this reason, we definitely prefer private lenders as they will (if you've built trust with them) often lend on the rehab too.

The truth is that you have to SPEND 20K to go to their school and learn the ropes.

If you want it to run well, you may be spending a lot of time at the property.

@Samuel Kim - please contact @Chris K. privately and allow him to show you how you can benefit from this wonderful strategy that he implemented for his many health professional clients.