The ATMs by Lamassu and Genesis are around $7000 but it looks like the hardware part is only around $1000 for a High end ATM in china. Can some one direct me in right direction to develop Bitcoin ATM software? Hire Blockchain developers? outsource to existing company that has experience in blockchain technology?
If you have a large capital, you should develop them, because 7000 - 8000 $ each, you should calculate how long you recover them.
In addition to the tellers, you would have to provide something like a bank service, security at ATMs, administrative expenses, among others.
You should put together a business plan, in case the tellers are few, I would recommend in lamassu to buy only the cashier and not the supports, the supports send them to manufacture to have less expenses (in case you want to save).
If you are in a country that does not have these ATMs, you may recover your investment