I am doing that now. Am in my 40s now, happily retired in KL, doing freelance teaching, blogging to occupy time. Rented out both condo in Singapore, after deduct loan, we net about $3k per month, RM9k for us to use in KL.
1 Restaurant meal in a atas mall for 4pax = RM90
Assuming we eat restaurant meal everyday twice a day = RM180 (this is crazy as will damage health, but someone posted it is pathetic to eat homecooked everyday). 1 month
No need for car, as we stayed next to KLCC
LRT, malls, supermarket, cinema, parks everything are walking distance. If we need to travel, we take uber or grab, cost us about RM20 to travel to as far as the Curve. So lets say we go far out for 2 times a week, RM320 on grab/uber. Can save even more if we use
LRT., but lets leave it at grab/uber.
Staying in a fully-paid luxurious condo, our condo in Singapore looks like public housing compared to KL condo, we have concierge, aircon huge lobby (like hotel), many layers of security (safer than in SG), sauna, gym, huge pool, baby pool, kids room, music room, 2 parking lot etc. Monthly fee RM400. Plus utility, total RM1000.
SO, total for above 3 big-ticket = RM5400 (Restaurant) + RM400 (transport) + RM1000 (utility) = RM6800. We still have RM 2200 to spend every month on excess like outpatient (fully insured hospital plan in Singapore), travel etc.
Life is good here in KL, but PLEASE dont come here, we dont like it to be full of Singaporeans to drive up the cost. Yes, its dangerous here, so pls remain in SIngapore ok.