Is it possible to write text inside of textboxes for editable values in the inspector?

Looks like the possible solutions to this problem are way more work then I want to spend on this tiny feature. However, I did run into the TooltipAtrribute and HeaderAttribute, and I think I'll probably be using one or the other for the same purpose. It's a little less sexy, but it gets the job done in one line of code. Here is an example of usage for those interested:

 [Tooltip("Units: m/s")]
 public float velocity = 0f;

Edit: Here is the real answer

So I guess I was just being lazy but someone on the Unity subreddit was kind enough to post a fully working solution and it's super simple. First you have to add two scripts to your project "AdditionalTextAttribute" and "AdditionalTextDrawer". In AdditionalTextAttribute.cs put this:

 using UnityEngine;
 
 public class AdditionalTextAttribute : PropertyAttribute
 {
 
     public readonly string Text;
     public AdditionalTextAttribute(string text)
     {
         Text = text + " ";
     }
 }

In AdditionalTextDrawer.cs put this:

 using UnityEditor;
 using UnityEngine;
 
 /*
  * Usage: simply put a Attribute in front of your variables like this:
  *
  *     [AdditionalText("m/s")]
  *     public float velocity = 20f;
  * 
  * Use at own risk for variables that are not rendered in text fields (you'll might get multiple texts over each other)
  */
 
 [CustomPropertyDrawer(typeof(AdditionalTextAttribute))]
 public class AdditionalTextDrawer : PropertyDrawer
 {
     public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
     {
         EditorGUI.PropertyField(position, property, label);
 
         var style = new GUIStyle(EditorStyles.label);
         style.alignment = TextAnchor.MiddleRight;
         style.normal.textColor = Color.gray;

         var attrib = attribute as AdditionalTextAttribute;
         GUI.Label(position, attrib.Text, style);
     }
 }

Then you can write code like the following anywhere in your project to get text inside of the property text field:

 [AdditionalText("m/s^2")]
 public float acceleration = 20f;

Looks great just like the reference image I gave! here is the github page for the original solution given to me, basically all I did was remove the namespace usage to make it even easier to throw into a project.