If money is your startup’s problem, you should open a branch to outsource some development work into cheaper countries, like Vietnam. Then, you would exchange 1 problem with another, probably harder than you thought.
Communication: this is a key. Effective, efficient, going into the right way. In startups, there are much less time for documentation. Things have to go really fast, features after features, products after products. It is much better for startups to go fast, try with different ideas until they get it correctly. And when they get the idea correctly, it is time to execute, as fast as possible to get the products into the market. Distance difference is a main barrier for communication, talking over Skype feels very different from talking face-to-face. Another barrier is time difference.
The time difference between Vietnam and America is huge, 10-15 hours time difference. When the Vietnamese developer wakes up, their colleague sleep, and vice versa. I have seen some approaches to this problem: scheduling out some fixed time in the day or week, to meet, or someone has to sacrifice. The first one is not normally working for startup when lots of communication needs to happen. The second one will not last for long.