I know there is not a ton of resources that don't require large financial commitments, just wanted to see if anybody knew of cheaper alternatives. 

I've worked with some Canadians buying  here in Ohio.Indeed, rather than selling your stocks to fund investments (and lose out on any potential price appreciation and dividend payments, as well as incurring capital gains taxes), a nice alternative is to borrow against some percentage of the holdings.You would start with the brokerage where you hold the stocks and see what their loan program looks like for the account you hold. 

@Ashish Acharya thank you for the helpful tax alternatives! 

Alternatives include using a 1031 exchange to buy a new rental property or completing the exchange first and then doing a cash-out refinance to fund the ADU.

Negotiate alternatives thereafter, but start the clock. 

Alternatively, platforms like Twilio provide excellent customization but might require more technical setup for Podio.

Unfortunately, this reassessment is unavoidable, so you’ll need to evaluate whether transferring the property is worth the potential tax increase.If a Transfer Is Not Feasible:If the potential property tax increase makes the transfer impractical, an alternative option is for your father-in-law to secure a Home Equity Line of Credit (HELOC) on the property.

If anyone has any other suggestions about alternative strategies in the area that could facilitate cashflow, Id be all ears.

Fuel costs likely to rise over time, but work from home helps

Another alternative would be to buy the property yourself, keep the mortgage in your name but have your daughter on the title.