Ah ha! I was selecting 'rides' and not 'staff'.
Thank you very much!
Btw: I got most of my structures in place, a few nice things. Got my peep numbers up to 2730 by year 12 and then started to run into problems with all the peeps in cells 3, 4, and 5. So many tweeks!
Yeah...... After all of course it's just (nearly) the same as with the "normal" RCT-CS-Rules
If you let your park run for more than a few years, without renewing/adding rides, the whole park goes down and will attract less peeps, etc, etc. Let alone if you let it run for more than 10 years
Okay, there are some special rules here, I agree. (But for that even you have found the trainer

)
Btw: my park is doing great!!!! just with my lousy 4 cells (and , due to the special rules of the contest a lesser amount of peep-attracting coasters than with more cells, for as we know the maximum amount of peeps that RCT enables into a park is related to the amount of rides - and especially beloved coasters, the greater the capacity of that ones the more people RCT allows , combined with park-rating of it all);
2650 guests after 4 years. Quality 997 (have to rehire new handymen!!!, for I want 999, also after 4 years!!!

) Think I would do very well in the just-rides-and-peepfriendly-parks you love (only....

it's not where my main interest/pleasure lays as long as it is not severely combined with the other possibilities of RCT2!)
No, I really did not test longer than 4 years. (Am sure I would have problems also after 10 years!!!)
I still have to do some "treeing-in" of the areas for which I don't have anymore time to place eye-pleasing archy in. Some other small things and a lot of necessary "finishng touches", and then I'll have to forget about the "wanted but not really necessary Finishing Touches" (okay, one cannot have everything).
Have Fun, really looking forward to see and especially RUN the parks!.