There are many home care options, and knowing the differences between the different types of services and service providers can aid you in making the right decision.
The post the fare schedule for each city on their website. e.g. here is Lyft Boston $2.25 + $1.50 per mile and $.30 per minute. It's hard to say what a typical ride is. In my experience Lyft is always cheaper than a Boston cab. UberX is sometimes cheaper as long as surge pricing is not turned on.
Track your mileage and then track how much you earned. Lyft drivers are now paid per ride, with 80% of the suggested donation going to the driver, and the rest to Zimride/Lyft. This averages about $18/hr throughout the week - dependent upon the times/days you drive.