Same here, I use a trellis too and it is quite a pain to disconnect the tubes. It's not impossible though, the fittings are an upside down t fitting, it goes straight up into the bottom of the buckets and the tubes connect horizontal. Still a pain in the ass to disconnect though since they are barbed fittings. I go a full grow before cleaning them and haven't had any problems yet. I use net pots on a lid that fits on the flood bucket so my roots are suspended and have no medium so I flood ALOT, the roots still get into the drain though and I even prune the roots 2x before flower. It's a constant battle
Ive thought about doing a kind of hybrid like you mention, had one experiment go really bad trying that recently the plants burned up, probably from not being flood enough,
I am running perlite in the buckets right now and hate moving and getting rid of the material, but I do not have any problems and the plants run beautifully,
I m veging in perlite hempy cups, then flip them into a perpetual ebb and grow,
Id like to know more about your flood schedule to keep from using so much perlite,
we used net pots with just a little bit of perlite in them letting the roots dangle down into the flood bucket,
please excuse the floor I just got done doing some trimming and the trimming is on the floor, we keep everything nice and clean