That is a good value add proposition and caters for the DIY and lifestylers who would pay a premium for a plug and play but as you say, how much is the question.
Do you have any end users in mind that may pay a discounted rate for a prototype. Any “produce” suppliers that may assist if they saw an end market opportunity?
It reminds me a bit of the Henergy smart mobile laying solution featured on the RNZ clip. https://www.rnz.co.nz/national/programmes/countrylife/audio/2018735214/that-s-hentertainment
If your solution was smart ( just internet connected to monitor say temp/humidity/light from an app there could be innovation grants available.
As Anna mentioned, there are a number of regional investor/angel networks that could be interested in hearing a pitch from you for seed funding.