You know what they say,........if it looks like B.S., smells like B.S. then it probably is B.S.
I don't know about you but I don't think I would believe any guarantees like that.
Worst case scenario, you are lending him your $3000 for 6 months and if you do everything and he does everything then you just have to TRY TRY TRY to get your money back as per the guarantee.
Maybe it might be real but in that line of work, if he got you jobs lined up towards the goal and the restaurants had a lowballer walk in and cut your price in half and went with them instead of you, does that still count since you did not do the job or does that amount go back in the pot?
There are a lot of questions that I would ask before handing over that kind of money.
Just my opinion.