I run a small service based business where we offer B2C consultating.

Recently, I have really improved my pitch and am beginning to see some good progress and revenue coming in.

Let's say my service costs GBP 30,000 and I offeres it to a client at 24,800 as an offer. Now I ideally would sign up the client on full payment upfront but I do often offer it at 65% upfront and 35% after delivery.

Now, came across this cheapass law baller who thinks he can do the same thing by hiring a freelancer and basically does not value our service.

He's suggesting to break it into 5 instalments and on top of it, wants to sign a contract that if the service is not delivered under certain time period, I will refund all money which is just pissing me off.

Some people who I trust have suggested me to avoid taking him onboard as if he's creating issues when signing up, it's best to not take him onboard and to value my peace very the little money he's going to bring in.

Any advice?