Income generated from within CA has to be reported in CA.

My credit is poor right now but can easily be improved as my income is much better lately. 

I run sum numbers for you please see comments below before refinancing and post refinancing .If I were in your position, I would approach it as follows:Initial Investment Assumptions: Market Value: $360,000 Purchase Price: $360,000 Equity: $0,000Financial Breakdown: Hard Money Loan (LTV 100%): $360,000 Interest Rate: 10% (30-Year Amortization) Monthly Payment: $1,995Upfront Costs: Origination fee (1%): $3,600 Closing Costs (3%): $10,800 Renovation Costs: $10,000 2 Month of Carrying Costs During Renovation: $5,390Total Upfront Required: $29,790Total Capital InvestmentPurchased price $360,000 Upfront Costs $29,790Total: $389,790To make this investment work, you need to rent the whole property for at least $3,165/month, refinance it let say after one year with 5% interest with a traditional mortgage.Year One Rent: Monthly Rent Income: $3,165 Monthly Rent Losses during renovations (2 Months): -$6,330 (-$527/month distributed over 12 months) Total Rent Income: $31,650 per year => $ 2,638 per monthMonthly Expenses: Hard Money Loan Payment (10% Interest): $1,995 / per month interest only Property Tax (Assuming $3,000/year): $250 per month Property Insurance (Assumption): $100 per month Utilities (Hydro, Gas, Water): $292 per month Assuming 0% Vacancy first year Assuming 0 % Repairs & Maintenance first year because unit has been recently renovated Total Monthly Expenses: $2,637Monthly Net Cash Flow: $1Post-Renovation Refinancing Strategy:So far, we’ve purchased the property, completed renovations, and rented it out.Next, you can approach the bank for a refinance to consolidate your initial investment of $29,790 plus your 360k debt into a mortgage.

Like Kevin stated, they don't care about your business even though Im sure you are not only generating income for the area the cabin is in (generating local sales tax) but presumably you are paying taxes not only on your property but on the income you make from STR biz. 

Success often comes from picking properties with strong chances for rent income or those that can be improved in value.

We both also have finance degrees and are savvy with finances and from an income perspective we are inline with each otherSimilar to what JD stated - We have a living trust where everything eventually goes to the kids and if something were to ever happen we would sit down like adults and resolve it without being vindictive. 

Those platforms issue their own 1099 (called a 1099-K), and if you include the credit card amounts they'll have overstated income. 

Feel free to shoot me an email if interested in coming to one of my events - I have several upcoming, happy to shoot you an invite. 

For some reason real estate is viewed as an income supplement and eventually income replacement by most who become interested in investing.

Padsplit people try to sell you that it's only a small portion of your income (1 out of the 6-8 members) vs if you do long term, you are losing 1 of 1 income. 4.