How long can a visiter stay in Nepal before they legally need to return home?

I am searching for a way to be with my Husband. He works for a non profit organization in Nepal. He helps many people and he is needed there. We also need each other. We are looking for a way to be together with as little cost as possible. Neither on of us have money. I am willing to move there but I have medical needs that would not be met there. I am looking for help. I am very willing to also work in the non profit organization helping the people of Nepal. I can teach basic computer skills, soldering and repair of computer boards, cook meals, and I am sure there are many other things I can contribute. I just need someone to fund this. So my first question is how long would I be able to stay.