My situation is similar to yours but my house is 4 bedrooms. I find if you don't have a lot of stuff (regular decluttering) and do housework regularly it doesn't take too long. I work 2 long days at the end of the week so nothing really gets done then, but for example:
Monday - clean whole house so go through each room dusting, polishing, wiping and hoover, upstairs takes about half an hour (including bathroom and ensuite), downstairs maybe an hour (lounge, kitchen, utility room, study, dining room, playroom). I literally flick round, nothing major.
Tuesday I'll Hoover and tidy up. Just go in each room and make sure everything is in it's rightful place. Takes 10 mins.
Wednesday the same as Monday.
Saturday just a general tidy up and Hoover. Again 10 mins.
The thing I do now to prevent the massive spring clean that I too used to get completely stressed about is - each time I do the housework I do one room more thoroughly - so e.g. in DD1's room will take everything off shelves or clean out cupboards, decluttering, clean thoroughly. Next time I might do a downstairs room e.g. the lounge - so will clean behind tv, dust wall pictures, clear out cupboards etc.
Each week on a Tuesday I'll do a rota job like clean the oven, wash outside, clean washing machine, all those sorts of jobs that need doing every so often. I have a list and just pick one! Sad!
Sounds really anal and boring but I find then that each room gets a really good clean every few weeks, nothing builds up to a real state and it doesn't take very long at all as it's never that bad to begin with. To me it's less stressful to just do it than leave it as that would make me more stressed iyswim!
To me, hoovering regularly makes a big difference, have a dog so no choice! And storage - everything put away!
Good luck in your new home!