RMH diy for a mobile home?

Hello all, my friend lives in a small mobile home. Presently she can not afford to use her heating, last year at this time she ran it a scant hour daily and her bill went from $50 US to $300 a month, she is elderly, disabled, and lives alone with two small dogs. I would like to build her a way to heat just her bedroom, safely, so that she can sleep comfortably and not be cold. My biggest concern is venting, obviously I would prefer she and the chiweenies wake up and not suffer co2 poisoning. Wondering if the 16 brick type stove can be built indoors and vented out a window? If so, could someone direct me to a good set of instructions? Willing to buy plans, just overwhelmed by all the variety.
Thank you in advance.

Hi Lori;
Welcome to Permies!
Very nice your trying to help your friend keep warm.
As far as a 16 brick stove goes.   I have not heard of them before.
It sounds like a cooking type stove not a heating stove.

I'm thinking that  even if you can build a 16 brick stove it is not going to stay warm  long enough to keep her warm.
A  wood stove vented out a window is problematical from a safety point of view as well.

I think, in this case a small propane or kerosine heater would be more appropriate and warmer.

There have been very small rocket mass heaters built. How much floor space could be dedicated to a heater? It would not require huge clearances like a wood stove, but you would want a couple inches to combustibles and a couple of feet in front to keep the wood feed away from danger. Is the home in decent structural condition? A few hundred pounds of masonry mass could hold enough heat to keep the chill off overnight without straining a reasonably sound floor.

Have you ever done any brickwork? Are you reasonably competent with tools? If so, you could easily build a simple bell style heater with J-tube core. If you give some dimensions for what space is available including locations of combustibles, I can draw a plan that you can follow.

Yowch! I'm familiar with the 16 brick Rocket stoves, and they're a very simple outdoor cooking stove, not indoor safe.

This (an option we're working with, ourselves) might be a better option, particularly paired with very long burning candles:  

There's a diagram of the setup, here: https://www.survivalsullivan.com/make-clay-pot-heater/

I do know how to use tools, have done some minimal brick and concrete work, more artistic than structural, yard fountains, garden walls. Her house is very cluttered, so clearance may be an issue. I looked at the sort of "radar dish" propane tank top heaters but was not sure if they were for indoor use, though a friend used to throw parties in her garage and used them, but a party, with lots of people milling about and going in and out doors, is a good bit different than a small bedroom with someone sleeping, in terms of air circulation and co2 buildup. I am going to have to do more research.

The tank top heaters would be massively unsafe in a small living space, for fire hazard as well as CO.

There are ones made for living spaces, a bit less than a foot cubed and made to hold a small propane canister or connect to a 20 lb. tank, which can be used in a well ventilated interior - my best friend has several in rooms of his small cluttered shop. I would be hesitant to use one in a sleeping room unless well ventilated or drafty.

With basic masonry skills, you should be able to make a safe mini RMH.