Hi Beth. Good to hear that you are visiting Delhi again. HOHO is an ideal partner for sightseeing for those having time constraints. HOHO bus tickets can be booked online for your convenience or can be taken from the office at Connaught place. Foreigners have to pay higher charges and I suggest you take 2 day sightseeing trip since its worth the money and you can spend more time at the places you like the most. The cost for travel is calculated for a whole day or 2 days. So no cost per stop. For the 1 day sightseeing the cost is 22 pounds for 2 persons. For 2 day sightseeing the cost is 27 pounds for 2 persons. You can get more information on hohodelhi website. There are total of 10 trips a day(5 buses with 2 shifts). If you want visit a place, get down at the stop or if you want to skip a place then sit back and relax. That is how HOHO works. The frequency of buses are 40mins which means you get minimum of 40mins at a place(if you want to spend more time, skip the bus and wait for the next one). Don't prefer monday for your travel(since some of the places will be closed). Regarding the time you want to spend at places, it depends on how much you like the place at the first glance and the taste for places(like art, history, leisure etc). I hope you get it. You can read my reviews of some places which I covered through HOHO. Have a Happy journey and enjoy.