When I'm trying stealth camping the 1-man tent I use (I use a 2-man for normal use as I like the space) is a Gelert Solo.
price is only about £24 at the moment at Sports Direct, but all-in (Tent, pegs, poles, flysheet, groundsheet and Guy ropes it is 1.6kg inclusive of a spare peg and extra 'bungees')
The price may mislead you regarding quality - I have been extremely happy with this tent, it is not a 'party tent', or a 'festival tent', the price has been reduced and reduced for the last couple of years as its no longer a production item and is on 'clearance'. It is a good strong, well made tent. I would not sell mine to swap it for anything.
Look very carefully at some quoted weights they are often not 'inclusive' as the supplier tries to convince you it is a lightweight tent.
The Track-1 is a very good specification with a HH of 3000mm, the specification states 1.8kg but I have weighed mine
https://www.sportsdirect.com/gelert-track-1-tent-783070?colcode=78307090
(Also available in 'matt-green')
The Gelert Track 1 Tent features an ultra lightweight pack size and benefits from No-see-um mesh ventilation and a darker bedroom for added privacy and a better nights sleep.
> 1 person tent
> Quick and easy to pitch
> Compact pack size
> No-see-um mesh ventilation
> Darker bedroom
> Side storage space for additional gear
> Ideal for backpacking
> Fabric outer: 190T polyester with waterproof PUT coating
> Fabric inner: 190T breathable polyester
> Groundsheet: 120g/m2 polyethylene
> Poles: 6.9mm fibreglass
> Pitch: Inner first
> Taped seams: Yes
> HH: 3000mm
> Fire retardant inner and outer
> Weight: 1800g
> Dimensions: L256 x W181 x H70cm
> Pack size: W48 x D44cm
I think you'll find that 'cheap' (affordable has so many meanings depending on the depth of your pocket) and 'under 1kg' do not sit well together.
My 3x3 DD Tarpaulin with a few pegs, some line and the bag weighs in at 1.030kg. There is not much of a tent (unless you want single skin and no groundsheet) for under 1kg