Hi,

DAG size is more than 4GB so you should be probably able to mine for some more time (not long) but your hashrate will be very limited by that. probably like 5Mhs now in windows and 8 in linux. so yes youa re able to mine some short period of time but actualy no 

There are too many masternode coins. But all they are not giving enough profit and we cannot trust all masternode coins. DASH is the most famous masternode coin. But the masternode setup investment is very high right now. Before you set up the masternode, you have to understand this,

Monthly profit = Monthly income - Monthly VPS cost

Choosing a masternode coin is very important. Do your own research about masternode coins before you invest. That project future updates, development team, market cap and volume are very important to choose masternode coins. I hope below sites are helps to choose a good masternode coin.

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[1] https://masternodes.online
[2] https://masternodes.pro

your masternode machines on aws (vps) should be on linux (ubuntu18 right now is most common selection i think, or debian/redhat/cent/etc), but control wallet could be running on any platform. some projects also have mn support in light clients (like https://github.com/AXErunners/electrum-axe), so you don't need to have full blockchain copy on control machine

Depends on coin. Most of super high ROI MN coins will just get value devaluted because of high infaltion. Same as with high PoS. You you should look for decent project that has not too high/not too low payouts. So you can pay your VPS server costs from MN income.

As AXE dev here chipped in with advice, I can recomened AXE as a good project. It's still easy to mine AXE, at least for now. Sadly it's not on any of larger exchanges so buying it will be harder. Only at freiexchange.com.

almost all current mn projects are scam on outdated codebase. 99% of the price is overinflated on completely empty githubs and network software with critical vulnerabilities. first thing to do is check the source code. example setup with ubuntu18 https://github.com/AXErunners/axe/wiki/Detailed-guide:-Masternodes

Yes my friend, all of the details that you need to know is already there. You'll just have to click the coin and you'll see "daily income", "weekly income", "monthly income" and "yearly income" and this varies due to market conditions.

And as for ROI the percetange is indicated at the list "ROI".

That means minimum worth of investment for example dash, you need $160,130 to start a MN for that coin.

Yes! that's an estimation but it can change and depends on how the market will turn into bullish.

If the market goes bull then that will increase.

Masternoda is a very interesting phenomenon. I know a lot of people who are specifically looking for projects that have masternod. May be a very good income in the future. Now there is a bear market and many coins that have masternods have lost a lot in price. This is a very sweet piece of delicious cake, you need to enjoy the moment!

You can see the list of masternodes on

https://masternodes.online/
https://masternodes.pro/

Most of the guides on how to run one is on the website of each coins that you'll choose.

Changing algorithm? Why? Perhaps it's better if just adding some codes on existing ones.