i service mine all the time without removing the lid.... I (optimistically) have 8 , 3 inch netcup holes in each lid (of 10 gallon steralite plastic bins).... even though I'm down to only 2 or 3 plants per bin... I have empty netcups with neoprine lids in all the empty holes....so I just work through those holes.... I have a kitchen sink rinse faucet (on a flexible hose ....you know ?) to fill up the bins.....and I use a battery powered, wand shaped, liquid pump to pump water or whatever out of the bins....
multi strains is goign to be more complex and cost more , no matter what method you use to grow them ... I only have 5 diff strains going ,,, and it's a cluster fuck ....But I'll learn from this and do things smarter next time....I still want to grow several diff strains , but will really concentrate on methods of timing and strain choice...
I think if you start 10 strains ...you'll be lucky if you end up with 5 successful after it's all said and done.
keep it simple ...and learn as you go ...and all will be good