We like playmobil a lot (doesn't help that I always wanted it as a kid, and never had any). If you kiddo likes imaginative play, or dollhouse-type stuff they're really very good and likely to get used a lot.
We happen to have one large house - I keep it on a short cart with a few shelves underneath (and we have a few storage boxes for small stuff, people we keep there). Then there's a trunk with other larger kinds of sets in it. A few really awkward sets are kept in their own boxes.
For awhile, I'd just toss all of each set in a large plastic bag and we kept the sets separate, then pull out the bags to play. It was good for keeping smaller pieces together with the larger set. Eventually it seemed less fun to play that way, or we seemed to have more sets and we mixed similar things together (all people in here, all animals & trees somewhere else, all furniture somewhere else, etc.). I do insist we keep the playmobil toys not mixed into other toys, but that's about it.
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