Budget <26K USD. Goal: travel to as many different countries while being abroad as long as possible

First thing I want to say it my actual budget is 30k but I want to have at least 3k in backup for emergencies and the cost of living/travel going up

Also ignore Brazil, the home lister had the $90 a month as a place holder (no I didn’t pay any type of money, but Idk how I didn’t realize it was too good to be true)

I’ve built this itinerary including all transportation (even to and from the airport of the places I will stay, food, and rent cost.) I didn’t factor in the cost of renting a bike/scooter only because some of the places will be walkable enough and some places like Armenia probably won’t have that option the way Sri Lanka or Indonesia would

I also didn’t include alcohol in my budget.
If possible with this budget I will still try to fit in some fun activities but if not I will add it to the budget

I have an international phone plan already so I didn’t include it in this budget

I would like to make my trip longer so I’m considering cutting my time down in Georgia to 2 months in Tbilisi and 1 or 2 in Batumi and cutting my time down in Armenia to 1 or 2 months. My original thought was staying in every country I picked as long as an American passport will allow you to stay there without extending visas, but cutting my time down in Georgia and Armenia will save lots of money and if I cut it out completely it would save me 9k which could get me a couple years in SE Asia. I was also thinking about cutting out Cambodia bc where I would stay there I would need to take a 6 hour bus ride to and from the airport and the meals aren’t as cheap as the surrounding countries and for 320 a month in rent the place isn’t as nice as the others. I may also cut out the Philippines bc travel time within the country takes so long, yes it’s cheap but you also get a cheap place to stay, where Vietnam is cheap but also has good infrastructure

I know I’m being pretty frugal on my budgets for each category but I want my trip to be as long as possible while still having fun and relaxing

Any other suggestions on things I should change? I would like to keep my rent under 350 a month preferably under 300 if I will be staying there for more than a month and food budget under 300 a month. I mainly eat one meal a day. If you have any suggestions I would like the places to be pretty safe but obviously doesn’t have to be like Singapore level of safe.

Also let me know if my budget just straight up isn’t realistic