Port forwarding from vps absolutely works. I do it often. Latency is a concern yes. Public IP (not necessarily static IP) or ipv6 would be the absolute cheapest though. If you have queries regarding set up, you can DM me over the weekend. Also I have the UCG Ultra, but would recommend something like UCG Fiber is probably a much better option.
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Appreciate the offer man. I will message you over the weekend. 
Currently using Airtel Fiber with Static IP (1Gbps) and Excitel (400Mbps) as a failover in Delhi.
I was in the same dilemma. I initially had Pfsense box since 2010-2018 then shifted to Asus router and flashed OpenWrt then Er605 > flashed Openwrt after an year or so then purchased Xiaomi BE6500. Good for basic stuff but not powerful enough for things I am looking to setup now after shifting back to my native place. For ease of use this was setup.
Xiaomi router has 2.5Gbps port and can do WAN failover ( Load Balancing and Aggregation )
I am currently looking at either Nanopi r6s / UCG ultra/Max and used BE6500 as an AP.
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Mikrotik RB5009 would meet your requirements
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