If the tenant is on lease still (which it sounds like he is not?)

This way I could increase my rental income without sounding like I increased their rent by 28%. - on a side note, even after 28% increase, their rent total is still about 30% below market.

Here are the key data points:Park info  Located in Alabama61 lots25 owner occupied homes18 park owned homes (14 currently rented; 4 currently being repaired and should be rented soon)18 vacant lotsAvg lot rent - $160 (unknown what the market rate is but it doesn't sound like there has been a rent increase in at least a year, maybe more)Avg POH rent - $400Expense ratio - seller claims 26% but I'm estimating 35% for the lots and 50% for the POH'sCity water - individually meteredSeptic - good condition (allegedly); a couple were pumped last year, none this year (no lagoon thank heavens)Seller claims gross income $130k, expenses $30k, and NOI $100kI calculated gross income of ~$135k, expenses of $60k (55% on POH and 35% on lot rentals), and NOI of $75kOther infoMom & pop seller, but park is listed with a brokerPark has been on the market for > 3 years (recent price reduction)Greater metro area stats look goodPopulation = 115kMedian home price = $105kUnemployment < 8%Household income > $40kHousing vacancy ~ 15%Closest Walmart is 7 miles awayFreeway is 1.5 miles awayNumbersMy valuation is coming out about $80k-$100k under the seller's asking priceWith conventional financing I'd be hoping for a purchase price of $500k, $100k down @ 6% over 20 years (not sure if this is plausible or not)Assuming that financing, I'm expecting net cash flow of $40k (after debt service)Upside potential is in raising rent and filling the 18 vacant lotsFollowing the same assumptions above, raising rent $50 (if the market supports it) would change NOI to ~$90k and net cash flow of just over $50kFilling the vacant lots could potentially increase gross rent up to somewhere between $150k-$200k, depending on what the appropriate occupancy rate is for the areaWithout verifying any of the above information (haven't offered anything yet so there's a lot of DD left to do), the deal seems to make sense. 

Does this sound right?

I  was told that most tenants go month to month after initial lease is up, but something about this sounds fishy.

I know this sounds like no big deal, but it can be a time suck once you scale up! 

Be less concerned with what sounds like high rates and points, and more concerned with the bottom line you WILL be walking away with.  

I feel comfortable with basic work such as paint, floors, kitchen upgrades, and maybe adding a bedroom/bathroom with the help of a contractor.Here a rough example with figures I just made up:Purchase – 120kRehab – 15kARV – 170kForced appreciation on rehab – additional 35k or 233% of rehab costDoes this sound right or way off?

.  :-)Sounds like a decent deal.  

@Juan Rosado this sounds like a great plan.