Kirkland : House Hack : Help me make sense of these numbers !

[Vic V.]

Hello y'all !

I'm currently super stressed about the financials of a property I'm strongly considering in the S Juanita Area in Kirkland. I'm going to be primarily using the house as a primary residence. However, there is potential for a basement that can be converted to an ADU. I'm having a tough time making sense of these numbers to see if this will make sense for me

Here are the numbers I'm looking at 

House - 5 bed /3ba @ 900 k Financed with 20% down.  

MIL/ADU unit - 1bed / 1ba will need to spend around 12 - 15k to get this rentable and permitted. Any thoughts on the permitting cost of an ADU? Ive heard that Kirkland is more recently promoting ADU's but would be great to hear thoughts.

Rent potential from ADU - My agent claims that it could rent for upto 1600 per month but based a quick craigslist search I see independent apartments going for 1500-2100. Any thoughts on what might be a reasonable estimate to account towards my estimate?

Overall, my goal is to keep my monthly mortgage related expenses in the 3000- 3500 region. Considering that ADU income is taxable and both my wife and I currently have other full time jobs (cant claim a higher deduction in real estate work). Does this deal make any financial sense long term?

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