I am new to business, but i have learned from others to only work in high end neighborhoods. In Louisville, the majority of these neighborhoods are houses bunched up close together, with very small yards. It would only take 15 minutes for 2 of us to mow, trim, edge, blow, etc.. Maybe even less than 15 minutes. Do i still charge the minimum $30 on yards so small? Also, do you guys charge tax to the monthly charge? Thanks for your advice!