It is a small village which houses very old Thrangu Tashi Yangtse Monastery which is one of the most important Buddhist pilgrimage sites in Nepal and one of the holiest in the world. It is known as the place where the Buddha, in a previous life as a prince, gave his body to a starving tigress and her cubs.
Namo Buddha is about 40km away from Kathmandu. You can take a local bus from Kathmandu (Ratna Park Bus station, 2-3 hrs) to Banepa and then change there to Namo Buddha one (there is at least one available at 9:00). This bus passes Dhulikhel so it's possible to catch up it there. Taxi fare from Kathmandu Rs1700-2000 for one way and Rs2500-3000 - return.
Or get a bus to Kavre Bhanjyang and then trek remaining 9km (2hrs) to Namo Buddha.
It is possible to walk to Dhulikhel which would take 3-4hrs.
As alternative you can hike to Panauti (ab 2-3hrs).
There are some local restaurants. Or if you stay in monastery's guest houses you can dine in there.
There is a few options for overnight stay: