The nrn rules and regulations doesnt talk about inherited property. It only provides an option for nrna card holder to buy property as specified in the regulation that too is also only after getting permission of the foreign secretary of Nepal. For inherited property the old law still holds which says a foreigner cant own property in Nepal and since you have accepted a citizenship of a foreign country you are no longer a Nepali citizen. For Nepal you are just like Billy joe or robert dinero if they chose to go to Nepal.
Ad a former Nepali u have two benefits nrna card and longterm visa showing fam ties in Nepal. Going from delhi is bullshit although it worked in the past. For US passport you'll need a visa for India anyway. They j ow what's going on bith in Nepal and in India so they will give u a hard time.althoight continuation of Nepali citizenship is mentoned in the new constitution, there are no laws based on that. That's why some of us are staying as a pr for over 20 years.