i'd advice u on a chemist in a high pop. area or a strategic location. movies margins are a bit low, but u can get more customers if u get them what the ask for rather than choosing from your stock.

Out of the two options above I suggest the Pop Corn Machine but you will need to invest in some Marketing.
Package your pop corn in different sizes of bags n supply to shops, kiosks small estate supermarkets. Try also to add roast groundnuts and sell them the same way. If possible make Mandazi's (the relatively small ones then u can distribute dozens) and distribute in the same way. If u have a base(Kibanda) make chapati/samosa/smokies as well.
Go to the customers esp for popcorn, groundnuts, n the Mandazi don't wait for em to come to you. I am assuming you are available all day and that you will identify a locality with the right customers for your goods. You will need to live a cheap lifestyle to avoid eating into your capital. Try vegetables if you've got what it takes. The competetion is rather stiff with DVDs n stuff N with Piracy etc there is not much hope.In a similar field though, I heard of a fellow who has invested in DSTV (He gets only a few sports channels hence pays less) N has started a kabiashara of showing football premier league etc when in season for abt a 10bob per head.

The DSTV business sounds good but that will need capital of more than 200,000 as you will need to have the DSTV,Chairs,Location,BIG SCREEN,Projector,security guards.

@ bomboclat Please expound on these when you have the time.

What are you good at? How did you get the 20k? Keep doing that over and over and you'll find it easier that starting a business that you think is easy because everyone is doing it. Most businesses in Kenya fail because of copying what your neighbours, friends or people around are doing.

One of my workmates a few months told me that he wanted to take a loan from the sacco to invest in shares and repay it in 24 months 8k installments and needed my advice on which counters to invest in. I asked him to do a list of the ones he thought would give good returns and he did. I was shocked! And that's when I realised this thing is not for everyone.
I advised him to add the 8k he wanted to use for repayment into his sacco contribution because that way he was guaranteed of making 8k every month. I also advised him to join wazua and place the same shares he had put on the list on the fantasy market. He's lost 33% so far and I know not of a more grateful person for the small advice I gave him.