You could get a smaller amount of panels at first, and later expand your solar farm. But I don’t know if that would keep the costs low enough to be manageable for you, as solar panels aren’t even the most expensive part of a solar farm. The biggest upfront investment would probably be all the electrical gear, e.g. the inverter, etc.
You could try getting a loan. Demand for renewable electricity is pretty high after all, banks might be willing to invest in something like this.