I am 80 years old and rely on investments for retirement income.

You kind of have to pick a lane - do you want income or 4 units in 4 years?

Im self employed, roughly make $130k gross anually, 1099 NEC , no debt at all, 740 credit score. 

My home in Boise will be on the market in coming days and I'll have nice capital gains thankfully, and my home is not in an LLC. 

I am looking for a RE financor/investor to lend me the amounted fix money we agree to buy the property for, and in exchange I will pay the investor a 6.3% interest by distributing monthly passive income to them in a duration of 15 years.Using the deal that I currently am seeking for now, This Fourplex is listed for $459,900. i plan to negiociate down to AT MOST $409,900 (50K less than asking price).

Different lenders can view income in various ways depending on who you speak with.

@Jay Fayz for SFR (1-4 family) Classifications are mostly opinion-based.Not aware of anyone tracking eviction rates, except Evictions Lab nonprofit that doesn't like landlords.Here's some info that might helpt:---------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

First tenant was on a fixed income as a retiree, so I was hesitant to increase the rent after the first lease period.

What kind of savings do you guys have in addition to the income savings each month? 

Michelle Wang,With all due respect, you should make plans to be in another business once you're out of Real Estate Investing (Residential, Income Property).There are Members of our MassRealEstate dot net Association that come crying to me about similar situations as yours i.e.