You can't even imagine the luck will be happening for a twice. Bitcoin is the only one and you must see that any development will need the funds until you develop your product use your own skill without needed the help from someone else.
As long as you can create a good product with your own hand and you don't need ico but you can try to do a marketing to attract the demand for your product.
I understand the core technology and can develop it by myself, most of which have already been implemented. But it is impossible for me to realize the whole product by myself (Application project), it is a very huge project.