once you have the final circuit laid out with the inputs and outputs, you can have a board made.
once you are certain of the input and output requirements, analog sensors or digital ones, how many outputs, etc, you can downsize your needs to use a chip that will work such as the ATTINY84 . a 14 pin chip with enough pins to monitor a couple sensors and control a couple pumps and fans. your board would have all the parts needed and be pretty low cost.
your electronics side, micro, relays, sensors, etc should be less than R 250 ($25 USD)
here in the US, I see solar pumps that will take water at ground level and raise it a foot or so. very small head pressure. but they cost around $150USD. with a battery backup that will run for a few hours. typically around 200 Gallons per hour. should be enough for moving water in a hydroponics greenhouse.