What do you do when some ask for multiple visits for single rate visit rate?

So, your regular drop in visit rate is $13. You can simply let them know that you're agreeable to doing more than just the two (or however many) walks discussed and booked, but the additional walks also need to be booked. It's as simple as that, in order for their dog to be taken care of with insurance coverage, each service needs to be booked (it's not necessary to turn down the job- they just need to pay for all 8). If you offered house sitting, some sitters may offer multiple walks for not more than their house sitting rate, since generally that's up to 24 hours of care).

Hopefully one of Rover's full time dog walkers will contribute on the ways to process this (besides having the client initiate if the extend a stay or past stay booking functions work with drop in visits).