Solution for Vacation mode limit

[effdog]

I used vacation mode (over-booked option) at least twice a month to slow down the number of sales I get…but now I cannot put vacation mode for another year…the only solution I could think of is increase the delivery time…which will not effect any rating or whatsoever…I have finals coming up and I will not have time to do fiverr…Im planning to put my delivery time to 16 days for my best selling gig which gets like 15 orders per day…will this affect anything? ideas? please leave your thoughts