That's how it all starts man!
YOU are responsible for ME working on getting some Tarantula cages setup just when I was getting ready to start rebuilding my HL setup with a collection of smaller Nep and orchid species. I will still do the HL nature vivarium and GH tanks but "first" I
have to get at least one T! The book didn't dissuade me from getting one like I figured it would.
The cricket dealer had a 3-4" Rosie for $30 last time I was there so if she's still there she'll probably be coming home with me on my next cricket run (tomorrow).
Incase you're wondering how to go about a naturally planted tank, I will be planting my HL display vivarium without pots, the GH tank below will be pots on a bed of LFS. Plants will be mounted on branches or "fake rocks", those planted in the "soil" portion will actually be growing in a mix of shredded cypress mulch and LFS, possibly some APS (Aquatic Plant Soil which is baked clay grit not actually "soil" per se). Outside of use as a background material and now spider substrate, peat is generally banned on my premises!
This "soil" will be suspended over a false bottom made of egg crate and weed guard with a bulkhead drain in the bottom of the tank so the soil will not get boggy from the daily rains supplied by an automated mister since there will always be open air beneath the soil. It should all just run straight through and out the drainpipe to a sump below to be emptied once a week or so... I'm lazy too! LOL
I've had my Anole tank running for 3 years in a similar vein - no drainage just a hidden pipe for siphoning the accumulated water but it's the same basic plan. The only time I've had to redo it was because I felt like it and wanted new plants, the ferns I put in in the last redo are now taking over everything - even the glass!