I'm wondering if anyone can help, it seems like I'm missing something.I generally estimate pretty conservatively, but I've missed by a mile.Property tax?

(ARV x 0.7) – Repairs = Maximum Purchase PriceMe and partner are looking at an off-market townhouse that needs 150k of work and has an ARV $1,100,000. (1,100,000 x .7) - 150,000 = 620,000620k would be the max purchase price thenIt rents for 6.5k/month, property taxes are 10k/year---a decent 1%erI ran the numbers thru the rental property calculator with putting 20% down and get conservatively 10% CoCWe believe the property to be a good deal.

Which I can expect £250-£300 from montly (Very conservative). 

There are definitely banks that are more conservative, so you may run into a lot of places that tell you one year.

It is an educated guess at best, so if you want to be conservative you could assume zero growth or the average which is 3%. 

But I would use conservative numbers when analyzing the potential rents and also assume you will need to put some money into the property to get there (improvements, vacancy when old tenants move out, etc.)

(I ran my numbers very conservatively to allow for my lack of experience in this)That’s about all I did.

I tried to calculate everything conservatively and make an offer that was low hoping he would counter and still leave me with some wiggle room to make money.

You can remain conservative and put a high downpayment (35-50%) while still availing the benefits of tax writeoffs through getting financing.

We also think about the ways we can make our deals conservative.