I have a few excel models, but wondering if anyone else has a model they prefer? 

@Scott Schultz, that's an excellent point.

@Greg Dickerson excellent answer !

Horrible) as long as it is paired with a credible website.

But yes as Braden said... none of it works or matters if you do not have a credible website.

I currently just use microsoft Excel, however my business is growing and that seems to take up quite a bit of time.

That is obviously not a reason to do it.What you need to do is build up your website and make it credible.

CREDIBILITY is what generates leads.... well actually that is a bit wrong too.My formula is  LEADS= SEO (and substitute anything that drives traffic to your site here) + CREDIBILITYSoLEADS = SEO(or /PPC/DMM/D4D/Bantit signs/FB/CR) + CREDIBILITYSo then according to this smexshie formula...

Poof, done, game over.If you come up with that ^@)}▀╝kδà▀ yellow letter, or amateur yellow post card and your competitor does the same and they have a powerful credible website to back them up when the seller does research on you, And they WILL do research on you... with a video, with 1000 and 1 raving testimonials, with before and after pictures of the houses they have flipped... and you are nowhere to be found.. you REALLLLLY think ANYONE will pick you?! 

Best Marketing is an attractive Sign in the yard of a Properly Priced Property that is in Excellent Condition.