What town or towns will Aela not complain in with children?
Ok so I just did a little experiment. Used up the past 12 hours of my life to find out this information so I hope everyone finds it helpful. In whiterun Aela will complain that the house is too small for her and the children and you. In Riften she fears that the kids will become thieves (even if you are the guildmaster for the thieves guild but whatever). In Markarth she fears that the children will easily get hurt or wind up in the mines. In windhelm she claims the streets are crawling with filth and unsafe for the kids. In the heartfire home she gets mad at the dragonborn for moving them into the wilderness to get attacked by wolves, bears and giant spiders (AELA YOU ARE A FREAKING WEREWOLF WHY ARE A FEW PESTS SUCH A BIG DEAL FOR YOU?!). Solitude however she is completely fine with.
Try to do it with safe homes like in Solitude. That house seems like nothing will both Alea. The house in Markarth also seems fine, though it might not be safe (because of elevation).
(Next time, don't have Alea as a spouse in the DLC, for she always complains, other spouses won't complain)