33, 130k income, 0 debt, best investment options?

Hi everyone, I’m new to this and need some advice. I’m 33, I have 20k in an emergency fund and 60k in a 401k. I make 100k salary (the company matches up to $2k and 6% of my salary to the 401k) I also make about 30k from my side business. I don’t have a car, mortgage or children. I live in a high cost of living area. I have 0 debt.

I’m also going through a divorce but hoping he will sign uncontested so I don’t lose any of my savings.

Here are some of the things I’m planning to do soon or next year:

Transfer savings to a HYSA – please comment your referral link if there are benefits.

Buying a multi family home with my brother and hiring a property management company – any advice, books to read about this? He’s handling this I’m just putting money down.

Expanding my side business and apply for an LLC – I read in this group I can get a solo 401k or Solo Roth and add 100% of the profit?

Start investing – I read in here about getting a Roth IRA and investing in a bunch of different ETFs, index funds etc. Where do I start? Can I get a traditional IRA to reduce my taxable income?

What stocks should I invest my 401k in? I spoke to a financial consultant that my job provides and they put it in different real estate stocks. I’m getting a 3.2% of return.

My boyfriend and I run the side business together but I have no idea how to handle our taxes every year as it’s mostly cash payments. I usually file everything under my name. Can I hire him as an employee or should he add his funds into a Roth solo 401k?

Is there anything else I should consider? I would love to retire before 50.

Thanks for your help!