Okay here's the deal with mobile. You're dealing with low quality traffic with short attention span. This means two things:
A: You'll get a shit ton of traffic at low cost
B: Most of the stuff you'll run won't convert
This just means you need to set up your tracking really good and target low CPA offers if you want to start on a budget. What works well on mobile? Email, mobile offers,... so dating, free email submits, email submit bizopps, grant email submits etc. Optimization of 10k-50k clicks a day can be simple though the last time I gambled away all my possessions my mom got scared and said "You're movin with your auntie and uncle in Bel Air" I whistled for a cab and the licence plate said FRESH. I pulled up to the house about 7 or 8 and I yelled to the cabbie yo homes smell ya later I looked at my kingdom I was finally there to settle my throne as the Prince of Bel Air